Atomic number of the element which has diffe rentiating electron enters into a d-subshell for the first time

Atomic number of the element which has diffe rentiating electron enter

1.	Atomic number of the element which has diffe rentiating electron enters into a d-subshell for the first time
Answer» <html><body><p>4s<br/>4p<br/>4f<br/>5s</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a></body></html>